This illustration shows a CDB with the following components:
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                  The CDB has a CDB$ROOTcontainer.
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                  A PDB$SEEDcontainer is plugged into the root container.
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                  Several PDBs are plugged into the root container. 
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                  One application container is plugged into the root container. 
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                  The application container has an application root container. 
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                  The application container has two application PDBs plugged into its application root container. 
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                  The application container also has an application seed plugged into its application root container. 
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                  A person icon labeled “PDB Administrator for hrpdb” has an arrow pointing to hrpdb. 
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                  A person icon labeled “CDB Administrator” points toward CDB$ROOT.
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                  A person icon labeled “Application Container Administrator” points to the application root. 
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                  A person icon labeled “Application PDB Administrator” points to the application PDBs.